Turning-lathe



(No Model.) 2 Sheets-Sheet 1.

E. H. LELAND.

TURNING LATHE.

wg ted Ap A TTORNEYS.

(No Model.) 2 Sheets-Sheet 2.

E. H. LELAND.

TURNING LATHE.

No. 275,051. Patented Apr.3, 1883.

WITNESSES: INVENTORY 552, W/Qd fsArL/Wz BY M ATTORNEYS.

EDGAR H. LELAND, OF EAST TEMPLETON, MASSACHUSETTS.

TURNlNG-LATH E.

SPECIFICATION forming part of Letters Patent No. 275,051, dated April 3,1883.

Application filed December 20, 1852.

(No model.)

.To all whom it may concern .Be it known that I, EDGAR HUBBARD LE- LAND,of East Templeton, in the county of Vorcester and State ofMassachusetts, have invented a new and useful Improvement inTurning-Lathes, of which the following is a full, clear, and exactdescription.

My invention consists of the contrivance of apparatus for automaticallylifting the lever that clutches the feed-nut with the feed-screw inautomatic lathes for turning chair-stocks; also, an automaticcontrivance for setting the lifting contrivance, the object being tosave the attendant the labor of lifting said lever each time a new pieceis put in the lathe, which has to be so frequently done as to make thelabor severe, all as hereinafter fully described.

-Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the said lathe with my improvementsapplied. Fig. 2 is a detail, in side elevation, showing part of theapparatus for automatically setting the lifting apparatus for saidlever. Fig. 3 is a plan view of the lathe. Fig. 4 is a plan of the latheinverted, with a part in horizontal section; and Fig. 5 is a transversesection on the line as w of Fig. 3. Fig. 6 is a top view; and Fig. 7 adetail view, showing the sash with its attachment for hearing down thelever.

It is to automatically raise the weighted lever a and cause the blocksb, which represent the feed-nut, to clutch with the feed-screw c to setthe carriage d in operation when the work has been duly placed betweenthe headcenters 6 and the tail-centerf, that I seek to accomplish, so asto spare the attendant the labor which has to be done so frequently inthese machines as to be very irksome, it being necessary to raise thesaid lever every time a piece is put in the centers and engage the leverwith the catch h by the pin 1', where it rests until the carriage hasrun its course toward the head-stock, when the pendent end of the catchcomes in contact with the stop 3', which trips it and allows the leverto fall and disconnect the carriage from the feed-screw preparatory tothe sliding of the carriage hack for beginning on a new piece to beturned. The weight on the lever a must be sufficient 'to promptly shiftthe clutch-nut when said lever is so tripped, and hence is too heavy forbeing lifted frequently by the attendant with comfort. tension, 1, ofsaid lever a in the opposite direction from its pivot along past avertical bar, m, carried at its lower end on the front arm of a bentlever, n, pivoted at 0 to the under side of the lathe-bed frame p, saidlever at extending by its rear arm out beyond the other side of thelathe, where it is connected with a weighted cord or a lifting-spring,q, to raise the rear arm of lever n and thrust bar m down at the propertime, so that by its latch s the bar at will press down extension Z, andconsequently raise lever a, thesame as if lifted up by the attendant.

To set the lever n and hold and trip it at the proper time the sash t,which is depressed by the carriage when the latter moves forward towardthe head-stock, has a piece, 20, attached to it, which bears said leverit down when the carriage nears the end of its movementin thatdirection, so that the latch 20, pivoted on bed 1), swings over and setsand holds said lever 12, with latch s of bar in sufficiently elevated toallow extension I of lever a to pass under said latch s, when thecarriage d is shifted back after lever a has fallen and disconnected theclutch-nut. Then, for tripping lever 72, for enabling the'aforesaidweight or the spring q to raise lever a, for locking the nut 11 Z) uponthe feed-screw, to run the carriage forward, I have connected latch w bya hooked rod, 00, with a bell-crank, 3 also pivoted tobedp, said crank ybeing connected to an arm, 2, of the rock-shaft a, pivoted at a beneaththe rear side plate of the bed 1), to which shaft a the arms b of thecentering-bar c are attached, on which the pieces to be put in the latheand turned are swung forward between the centers, the arrangement beingsuch that when the centering device is swung back after the piece iscentered it will work the bell-crank so as to pull the latch to fromlever n immediately after the piece has been fixed between the centersand set in motion, so that the lever'a will be lifted by the lowering ofbar at by spring (1 through lever n, as above described, and thecarriage thus set in gear at the proper time.

The methodof shifting the carriage back to I therefore propose to makean exthe tail-stock, the function of the sash, and the arrangement ofthe cutting-tools need not be described, as they are all the same as inthe machines now used.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The lever (t, having the extension I, incombination with the lever n, carrying on a front arm the vertical barm, with latch s, and connected by a rear arm with a lifting-spring, q,whereby lever a may be automatically raised, as described.

2. The sash if, having the piece to, and the swinging latch 20, pivoted0n bedp, in combination with the lever n, carrying bar m, with latch s,the lever a, having extension l, and the carriage 01, whereby the levern is set, held, and tripped, as described.

3. The latch w and bell-crank y, both pivoted to the bed 19 andconnected by a hookrod, w, in combination with a rock-shaft having thearm 2, connected with said crank, and the centering-bar having the arms1), whereby the crank may be so operated as to pull the latch from levern at the time and for the purpose specified.

EDGAR H. LELAND.

Witnesses WM. A. PUTNAM, GEORGE P. WHrrconB.

